Mike@Forge
Go Kart Champion
- Location
- Orlando FL
- Car(s)
- 07 BMP GTI Pkg 0
This is a teaser thread only.
Please do not ask me for a specific horsepower gains, a release date or pricing info yet.
I will, though, provide an explanation for the purpose behind an upgraded wastegate actuator and give you a bit of insight into this separate product line that we offer for a wide variety of turbocharged applications with great success.
The higher than stock base spring pressure within our replacement units allows for the wastegate flapper to be held closed tighter and for longer against the exhaust gas pressure flowing through the turbo.
With the weaker spring of the stock unit, the exhaust gas pressure can sometimes easily force the wastegate flapper open prematurely. When this occurs, the exhaust gas that is supposed to be spooling the turbo is dumped, which will slow the speed of the compressor wheel and limit the potential to build boost further.
Tightening the stock unit and adding preload to the stock actuator spring will have the same effect as our replacement, as many people are finding with wastegate tweak mods, but to a much lower degree. You're working with an altogether weaker spring to begin with. Somewhere in the neighborhood of 7-10 PSI base pressure.
We can assemble our units with any one of 3 different base spring pressure ranges stiffer than stock, so the possibility of the exhaust gas pressure prematurely opening the flapper against this higher spring pressure is minimized, if not completely eliminated.
All of the exhaust gas is then kept within the exhaust housing of the turbo and is forced to continue spooling the wheel keeping boost at it's peak potential at all times.
A boost controller, mechanical or electronic, and including the stock N75 valve will still allow you to adjust up from the base actuator spring pressure, and it will open the actuator when the target boost pressure is reached, but with the stock unit, there is still the potential for the exhaust gas pressure to prematurely force open the wastegate BEFORE the target boost is reached and the boost controller would send the signal to open the actuator.
With our unit, the boost controller will still function in the same way, sending the pressure signal to the actuator to open it fully when the target boost level is reached, but there is far less chance of the exhaust gas pressure opening the flapper before that occurs.
Depending upon which base spring pressure is used and how the units are adjusted, you may see changes like quicker spool, less tapering, and an overall increase in the area under the boost curve.
The units are piston based, which serves as a much more reliable alternative to the diaphragm based OEM units as well.
We make widely popular setups for all of the following applications:
Evo 5, 6, 7, 8, 9, and 10
Dodge Neon SRT-4
Nissan 350Z and Chevy LS Motor APS twin-turbo kits
Mazdaspeed 2.3 Liter Turbo
Subaru IHI VF-series and Mitsubishi TD-series turbochargers
Lotus 4-cylinder and V8 turbo engines
..........and many more.
The Neon SRT-4, for instance, has seen gains as much as 15 whp and 70 lb/ft of torque from simply bolting on the unit in place of the factory actuator with suitable fueling and tuning to suit (Mopar stg. 2 ECU and injectors).
Our replacement for the Evo 10 saw an increase of 50 whp as the ONLY change over the stock actuator on an OEM turbo modified with a larger compressor wheel.
We have also recently developed a pair of units for the all-new Nissan GT-R which will be released soon.
:thumbsup:
We haven't yet dynod the 2.0T unit, and gains will vary based on which base spring pressure we decide to use, how it is adjusted and what tuning is used, but we'll have more details in the coming weeks as we do some more testing.
:thumbsup:
Please do not ask me for a specific horsepower gains, a release date or pricing info yet.
I will, though, provide an explanation for the purpose behind an upgraded wastegate actuator and give you a bit of insight into this separate product line that we offer for a wide variety of turbocharged applications with great success.
The higher than stock base spring pressure within our replacement units allows for the wastegate flapper to be held closed tighter and for longer against the exhaust gas pressure flowing through the turbo.
With the weaker spring of the stock unit, the exhaust gas pressure can sometimes easily force the wastegate flapper open prematurely. When this occurs, the exhaust gas that is supposed to be spooling the turbo is dumped, which will slow the speed of the compressor wheel and limit the potential to build boost further.
Tightening the stock unit and adding preload to the stock actuator spring will have the same effect as our replacement, as many people are finding with wastegate tweak mods, but to a much lower degree. You're working with an altogether weaker spring to begin with. Somewhere in the neighborhood of 7-10 PSI base pressure.
We can assemble our units with any one of 3 different base spring pressure ranges stiffer than stock, so the possibility of the exhaust gas pressure prematurely opening the flapper against this higher spring pressure is minimized, if not completely eliminated.
All of the exhaust gas is then kept within the exhaust housing of the turbo and is forced to continue spooling the wheel keeping boost at it's peak potential at all times.
A boost controller, mechanical or electronic, and including the stock N75 valve will still allow you to adjust up from the base actuator spring pressure, and it will open the actuator when the target boost pressure is reached, but with the stock unit, there is still the potential for the exhaust gas pressure to prematurely force open the wastegate BEFORE the target boost is reached and the boost controller would send the signal to open the actuator.
With our unit, the boost controller will still function in the same way, sending the pressure signal to the actuator to open it fully when the target boost level is reached, but there is far less chance of the exhaust gas pressure opening the flapper before that occurs.
Depending upon which base spring pressure is used and how the units are adjusted, you may see changes like quicker spool, less tapering, and an overall increase in the area under the boost curve.
The units are piston based, which serves as a much more reliable alternative to the diaphragm based OEM units as well.
We make widely popular setups for all of the following applications:
Evo 5, 6, 7, 8, 9, and 10
Dodge Neon SRT-4
Nissan 350Z and Chevy LS Motor APS twin-turbo kits
Mazdaspeed 2.3 Liter Turbo
Subaru IHI VF-series and Mitsubishi TD-series turbochargers
Lotus 4-cylinder and V8 turbo engines
..........and many more.
The Neon SRT-4, for instance, has seen gains as much as 15 whp and 70 lb/ft of torque from simply bolting on the unit in place of the factory actuator with suitable fueling and tuning to suit (Mopar stg. 2 ECU and injectors).
Our replacement for the Evo 10 saw an increase of 50 whp as the ONLY change over the stock actuator on an OEM turbo modified with a larger compressor wheel.
We have also recently developed a pair of units for the all-new Nissan GT-R which will be released soon.
:thumbsup:
We haven't yet dynod the 2.0T unit, and gains will vary based on which base spring pressure we decide to use, how it is adjusted and what tuning is used, but we'll have more details in the coming weeks as we do some more testing.
:thumbsup:
